Moffat had always intended for Amy and Rory to get married "from the off". Moffat described the conclusion as the story of how Amy has been changed by the Doctor and the Doctor's success at restoring her spirit to the girl he first met, believing that a man could drop out of the sky and "fix everything". However, he did not return for her as he had promised and she grew believing that he was a liar and could not be trusted; Amy returns to her original belief when she stands up at her wedding and proclaims that the Doctor is real and that he will arrive. Though the episode is the end of the series, Moffat left questions to be answered in the next series, including the mystery of River Song's identity and the "Silence" which appeared to cause the TARDIS to blow up. "The Big Bang" deliberately revisits several scenes from earlier in the series. The first scene in the episode mirrors the start of "The Eleventh Hour". As the Doctor rewinds through his life, he sees events which relate to "The Lodger", but which were not shown in that episode. His conversation with Amy during the events of "Flesh and Stone", however, appeared in that episode. It was shot in extreme close-up but the Doctor's tweed jacket is still visible, which the present Doctor in that episode had previously lost to the Weeping Angels. Moffat found it interesting that the Doctor regularly experienced time out of order and was used to a whole different kind of causality. He believed that the Doctor would attempt to cheat and break his own rules to save the universe from collapsing. The time travel used in the episode is compatible with the theory of time travel. As the episode features many "time-jumps" when the Doctor travels back to do things seen in the opening credits, Moffat decided to make it less complicated by allowing the audience to figure things out before they occurred. He did this by calling attention to the future-Doctor in the opening scenes by having him wearing a fez and holding a mop, and as the viewers saw the Doctor later acquire these items they would begin to connect the events. Moffat mentioned the fez to fellow executive producers Piers Wenger and Beth Willis; they both were worried that Smith would become too attached to the hat and